Provided are a novel amylose derivative which exhibits excellent optical isomer separability and which is suitable as an optical isomer separating agent; and an optical isomer separating agent containing the amylose derivative. A task is attained by an amylose derivative having a constituent unit represented by formula (I) below; In below formula (I), R.sup.1 is a substituent group represented by any of formulae 1 to 3 below, and R.sup.2 is a substituent group represented by any of formulae a to g below. R.sup.1 and R.sup.2 are different substituent groups. A combination of R.sup.1 and R.sup.2 in which R.sup.1 is a substituent group represented by structural formula 3 and R.sup.2 is a substituent group represented by structural formula c is excluded from the formula (I).

##STR00001##

Provided are a novel amylose derivative which exhibits excellent optical isomer separability and which is suitable as an optical isomer separating agent; and an optical isomer separating agent containing the amylose derivative. A task is attained by an amylose derivative having a constituent unit represented by formula (I) below; In below formula (I), R.sup.1 is a substituent group represented by any of formulae 1 to 3 below, and R.sup.2 is a substituent group represented by any of formulae a to g below. R.sup.1 and R.sup.2 are different substituent groups. A combination of R.sup.1 and R.sup.2 in which R.sup.1 is a substituent group represented by structural formula 3 and R.sup.2 is a substituent group represented by structural formula c is excluded from the formula (I). ##STR00001##

Guanidine-functionalized particles and methods of making and using such particles.

Guanidine-functionalized particles and methods of making and using such particles.

A filtration device (1, 1) has a housing (2, 2) with an inlet (3, 3) to supply fluid to be filtered and an outlet (4, 4) to discharge filtered permeate. A filter module (5, 5) is between the inlet and outlet and has membrane layers (9, 9) connected to the housing (2, 2) in a fluid-tight manner. An inflow channel (11, 11) is at the inlet side (3, 3) and an outflow channel (12, 12) is at the outlet side (4, 4). A compressible and flow-permeable intermediate layer (10, 10) is arranged between at least two membrane layers (9, 9). The intermediate layer (10, 10) is made of a nonwoven material with: a thickness corresponding to 20 to 200% of the thickness of the membrane layers (9, 9), a basis weight of 10 to 150 g/m.sup.2, and an air flow rate therethrough of 150 to 5000 L/(m.sup.2 * s).

A host material may be used for the separation of elements or compounds, wherein the host material is an organic molecular solid with suitable cavities for accommodating a guest material to be separated, and with interconnections between the cavities to allow the guest material to diffuse through the host material, and wherein said interconnections are closed for a proportion of the time or have a static pore limiting diameter which is smaller than the static dimension of the guest material. Applications include separations of rare gases, chiral molecules, and alkanes. One class of suitable host materials may be made by imine condensation.

Disclosed herein are compounds, compositions, methods and kits for purifying a serine protease and serine proteases purified with the compounds, compositions and methods.

The invention discloses a method of separating a biomolecule from at least one other component in a liquid, comprising a step of contacting said liquid with a separation matrix comprising a solid support and polymer chains bound to said solid support. The polymer chains comprise units derived from a first monomer of structure CH.sub.2CH-L-X, where L is a covalent bond or an alkyl ether or hydroxysubstituted alkyl ether chain comprising 2-6 carbon atoms, and X is a sulfonate or phosphonate group.

The invention discloses a method of separating a biomolecule from at least one other component in a liquid, comprising a step of contacting said liquid with a separation matrix comprising a solid support and polymer chains bound to said solid support. The polymer chains comprise units derived from a first monomer of structure CH.sub.2CH-L-X, where L is a covalent bond or an alkyl ether or hydroxysubstituted alkyl ether chain comprising 2-6 carbon atoms, and X is a sulfonate or phosphonate group.

Methods are provided for synthesizing ZSM-58 crystals with an improved morphology and/or an improved size distribution. By controlling the conditions during synthesis of the ZSM-58 crystals, crystals of a useful size with a narrow size distribution can be generated. Steaming the H-form DDR framework type crystals at a temperature from 426 C. to 1100 C. for a time period from about 30 minutes to about 48 hours can attain one or more of the following properties: a CH4 diffusivity of no more than 95% of the CH4 diffusivity of the unsteamed H-form DDR framework type crystals; an N2 BET surface area from 85% to 110% of the surface area of unsteamed H-form DDR framework type crystals; and an equilibrium CO2 sorption capacity from 80% to 105% of the equilibrium CO2 sorption capacity of unsteamed H-form DDR framework type crystals.